Dave
It does of course depend on the UV source and the photo board but 15s
sounds far too short.
Using laser printed art work on acetate, with my UV box (2 x 8W tubes)
and using pre coated board (usually from Mega Electronics) I need about
3 minutes.
But as folk have suggested try a test strip.
http://www.piclist.com/tecHREF/piclist/biketut/chapter3.html#zzee_link_9_1019487419Paul
On 12/05/2013 15:07, dave_donlan wrote:
>
> Hi guys
> I am using UV exposure method on clear acetate
>
> 15 secs exposure caustic soda developer about a 60 secs
>
> hydrochloric acid / peroxide etchant no bubbler just sloshing about
> but the problem is the protective layer is coming off after a few
> minuets of etching
>
> hydrochloric is 30%
> peroxide is 9%
>
> Any advice please
> Dave
>
>
>
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